Chain-tightener.



PATENTED MAY 5,1903.

E. W. BURGESS. CHAIN TIGHTENER. APPLICATION FILED JUNE 9, 1902.

H0 MODEL.

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UNITED STATES EDWARD W. BURGESS, OF MILWAUK Patented May 5, 1903.

EE, WISCONSIN, ASSIGNOR TO INTER- NATIONAL HARVESTER COMPANY, OF CHICAGO, ILLINOIS, A CORPORA- TION OF NEW JERSEY.

CHAIN-TIG HTEN ER.

SPECIFICATION forming part of Letters Patent N 0. 727,083, dated May 5, 1903.

Application filed June 9, 1902.

To all whom it mag concern:

Be it known that I, EDWARD W. BURGESS,

a citizen of the United States, residing at Mil:

\vaukee, in the county of Milwaukee and State 5 of \Visconsin, have invented certain new and useful Improvements in Chain-Tighteners, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

My invention relates to improvements in chain-tighteners in which one or more of the chain-wheels are movable bodily with their shafts or journals in a direction to tighten the chain; and the objects of my improvement are, first, to provide a guideway to guidethejournal in a proper direction; second, to provide a positive means for forcing the journal along the guideway. I attain these objects. by the mechanism illustrated in the accom panying drawings, in Which- Figure l is a plan view; Fig. 2, a vertical section onthe line A B, Fig. 1; and Fig. 3 is a detached view of the scroll-lever.

Similar numerals refer to similar parts throughout the several views.

1 is an L-shaped railsupporting the various parts of the mechanism and forming a part of the frame of the machine of which the chain-tightener forms a part.

2 is a slotted bracket or plate secured to the. part 1.

3 is a stud-journal, on which is mounted the sprocket-Wheel 4.

5 is a scroll or cam-shaped lever resting upon the plate 2.

6 is a washer seated on the outer end of the stud 3, and 7 is a bolt that clamps the various parts together.

On the plate 2 is formed a lug 8, which engages with the cam-shaped outer edge of the lever 5, as shown in Fig. 2. On the lever is formed the angular hub 9, and the plate 2 is provided with the slot 10, coinciding with the slot 11 in the part 1. It may be seen that as Fig. 2 is a vertical section on line A B of Fig. 1 the plate 2 on this line is below the horizontal web of the L-shaped frame-piece. It is designed to have that portion of the upper Serial No. 110,770. (No model.)

surface of the plate that is outside of the frame-piece in line with the upper surface of said frame-piece, so that the broad base of the stud will rest upon each.

In operating the device the operator loosens the nut on the bolt 7. Then by placing a Wrench on the angular boss 9 the lever 5 is turned in the direction required, and the back of the lever engages with the projection 8 on the plate 2 and moves the bolt 7, stud 3, and wheel 4: along the plate 2 until the required tightness is obtained, when the nut is tightened on the bolt 7 and the various parts thereby secured in position.

What I claim as my invention, and desire to secure by Letters Patent, is-- 1. In a chain-tightener, the combination of a frame-piece, there beingaslot in said framepiece, a plate having a slot coinciding with the slot in said frame-piece, there being an abutting lug on the plate, a stud-journal supported by the frame-piece, a chain-wheel journaled on the stud, a cam-shaped lever, having'a portion of its periphery resting against the .abutting lug, and a bolt that passes through the lever, the plate and stud-journal, ,whereby they are secured in operative position.

2. In a chain-tightener, the combination of, a frame-piece, there being a slot in said piece, a plate having a slot coinciding with the slot in said frame-piece, there being an abutting lug on the plate, a stud-journal supported by the frame-piece, a chain-wheel journaled on the stud, a cam-shaped lever having a portion of its periphery resting against said abutting lug, there being an angular projection on the lever, and a bolt that passes through the lever, the plate, and the studjournal, whereby they are secured in operative position.

In witness whereof I hereto affix my signature in presence of two witnesses.

EDWARD W. BURGESS.

Witnesses:

FRANK J. DRYBURGH, EARLE J. BRYDEN. 

